1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) Tom Kistner <tom@duncanthrax.net> 2003 - 2015
7 * Copyright (c) The Exim Maintainers 2015 - 2018
10 /* Code for calling virus (malware) scanners. Called from acl.c. */
13 #ifdef WITH_CONTENT_SCAN /* entire file */
16 #ifndef DISABLE_MAL_FFROTD
19 #ifndef DISABLE_MAL_FFROT6D
22 #ifndef DISABLE_MAL_DRWEB
25 #ifndef DISABLE_MAL_AVE
28 #ifndef DISABLE_MAL_FSECURE
31 #ifndef DISABLE_MAL_KAV
34 #ifndef DISABLE_MAL_SOPHIE
37 #ifndef DISABLE_MAL_CLAM
40 #ifndef DISABLE_MAL_MKS
43 #ifndef DISABLE_MAL_AVAST
46 #ifndef DISABLE_MAL_SOCK
49 #ifndef DISABLE_MAL_CMDLINE
54 typedef enum {MC_NONE, MC_TCP, MC_UNIX, MC_STRM} contype_t;
59 const uschar * options_default;
63 #ifndef DISABLE_MAL_FFROTD
64 { M_FPROTD, US"f-protd", US"localhost 10200-10204", MC_TCP },
66 #ifndef DISABLE_MAL_FFROT6D
67 { M_FPROT6D, US"f-prot6d", US"localhost 10200", MC_TCP },
69 #ifndef DISABLE_MAL_DRWEB
70 { M_DRWEB, US"drweb", US"/usr/local/drweb/run/drwebd.sock", MC_STRM },
72 #ifndef DISABLE_MAL_AVE
73 { M_AVES, US"aveserver", US"/var/run/aveserver", MC_UNIX },
75 #ifndef DISABLE_MAL_FSECURE
76 { M_FSEC, US"fsecure", US"/var/run/.fsav", MC_UNIX },
78 #ifndef DISABLE_MAL_KAV
79 { M_KAVD, US"kavdaemon", US"/var/run/AvpCtl", MC_UNIX },
81 #ifndef DISABLE_MAL_SOPHIE
82 { M_SOPHIE, US"sophie", US"/var/run/sophie", MC_UNIX },
84 #ifndef DISABLE_MAL_CLAM
85 { M_CLAMD, US"clamd", US"/tmp/clamd", MC_NONE },
87 #ifndef DISABLE_MAL_MKS
88 { M_MKSD, US"mksd", NULL, MC_NONE },
90 #ifndef DISABLE_MAL_AVAST
91 { M_AVAST, US"avast", US"/var/run/avast/scan.sock", MC_STRM },
93 #ifndef DISABLE_MAL_SOCK
94 { M_SOCK, US"sock", US"/tmp/malware.sock", MC_STRM },
96 #ifndef DISABLE_MAL_CMDLINE
97 { M_CMDL, US"cmdline", NULL, MC_NONE },
99 { -1, NULL, NULL, MC_NONE } /* end-marker */
102 /******************************************************************************/
103 # ifdef MACRO_PREDEF /* build solely to predefine macros */
105 # include "macro_predef.h"
108 features_malware(void)
114 spf(buf, sizeof(buf), US"_HAVE_MALWARE_");
116 for (const struct scan * sc = m_scans; sc->scancode != -1; sc++)
118 for (s = sc->name, t = buf+14; *s; s++) if (*s != '-')
121 builtin_macro_create(buf);
125 /******************************************************************************/
126 # else /*!MACRO_PREDEF, main build*/
129 #define MALWARE_TIMEOUT 120 /* default timeout, seconds */
131 static const uschar * malware_regex_default = US ".+";
132 static const pcre * malware_default_re = NULL;
136 #ifndef DISABLE_MAL_CLAM
137 /* The maximum number of clamd servers that are supported in the configuration */
138 # define MAX_CLAMD_SERVERS 32
139 # define MAX_CLAMD_SERVERS_S "32"
141 typedef struct clamd_address {
149 #ifndef DISABLE_MAL_DRWEB
150 # define DRWEBD_SCAN_CMD (1) /* scan file, buffer or diskfile */
151 # define DRWEBD_RETURN_VIRUSES (1<<0) /* ask daemon return to us viruses names from report */
152 # define DRWEBD_IS_MAIL (1<<19) /* say to daemon that format is "archive MAIL" */
154 # define DERR_READ_ERR (1<<0) /* read error */
155 # define DERR_NOMEMORY (1<<2) /* no memory */
156 # define DERR_TIMEOUT (1<<9) /* scan timeout has run out */
157 # define DERR_BAD_CALL (1<<15) /* wrong command */
159 static const uschar * drweb_re_str = US "infected\\swith\\s*(.+?)$";
160 static const pcre * drweb_re = NULL;
163 #ifndef DISABLE_MAL_FSECURE
164 static const uschar * fsec_re_str = US "\\S{0,5}INFECTED\\t[^\\t]*\\t([^\\t]+)\\t\\S*$";
165 static const pcre * fsec_re = NULL;
168 #ifndef DISABLE_MAL_KAV
169 static const uschar * kav_re_sus_str = US "suspicion:\\s*(.+?)\\s*$";
170 static const uschar * kav_re_inf_str = US "infected:\\s*(.+?)\\s*$";
171 static const pcre * kav_re_sus = NULL;
172 static const pcre * kav_re_inf = NULL;
175 #ifndef DISABLE_MAL_AVAST
176 static const uschar * ava_re_clean_str = US "(?!\\\\)\\t\\[\\+\\]";
177 static const uschar * ava_re_virus_str = US "(?!\\\\)\\t\\[L\\]\\d+\\.0\\t0\\s(.*)";
178 static const uschar * ava_re_error_str = US "(?!\\\\)\\t\\[E\\]\\d+\\.0\\tError\\s\\d+\\s(.*)";
179 static const pcre * ava_re_clean = NULL;
180 static const pcre * ava_re_virus = NULL;
181 static const pcre * ava_re_error = NULL;
184 #ifndef DISABLE_MAL_FFROT6D
185 static const uschar * fprot6d_re_error_str = US "^\\d+\\s<(.+?)>$";
186 static const uschar * fprot6d_re_virus_str = US "^\\d+\\s<infected:\\s+(.+?)>\\s+.+$";
187 static const pcre * fprot6d_re_error = NULL;
188 static const pcre * fprot6d_re_virus = NULL;
193 /******************************************************************************/
195 #ifndef DISABLE_MAL_KAV
196 /* Routine to check whether a system is big- or little-endian.
197 Ripped from http://www.faqs.org/faqs/graphics/fileformats-faq/part4/section-7.html
198 Needed for proper kavdaemon implementation. Sigh. */
199 # define BIG_MY_ENDIAN 0
200 # define LITTLE_MY_ENDIAN 1
201 static int test_byte_order(void);
205 short int word = 0x0001;
206 char *byte = CS &word;
207 return(byte[0] ? LITTLE_MY_ENDIAN : BIG_MY_ENDIAN);
211 BOOL malware_ok = FALSE;
213 /* Gross hacks for the -bmalware option; perhaps we should just create
214 the scan directory normally for that case, but look into rigging up the
215 needed header variables if not already set on the command-line? */
216 extern int spool_mbox_ok;
217 extern uschar spooled_message_id[MESSAGE_ID_LENGTH+1];
220 /* Some (currently avast only) use backslash escaped whitespace,
221 this function undoes these escapes */
228 if (*p == '\\' && (isspace(p[1]) || p[1] == '\\'))
229 for (p0 = p; *p0; ++p0) *p0 = p0[1];
232 /* --- malware_*_defer --- */
234 malware_panic_defer(const uschar * str)
236 log_write(0, LOG_MAIN|LOG_PANIC, "malware acl condition: %s", str);
240 malware_log_defer(const uschar * str)
242 log_write(0, LOG_MAIN, "malware acl condition: %s", str);
245 /* --- m_*_defer --- */
247 m_panic_defer(struct scan * scanent, const uschar * hostport,
250 return malware_panic_defer(string_sprintf("%s %s : %s",
251 scanent->name, hostport ? hostport : CUS"", str));
254 m_log_defer(struct scan * scanent, const uschar * hostport,
257 return malware_log_defer(string_sprintf("%s %s : %s",
258 scanent->name, hostport ? hostport : CUS"", str));
260 /* --- m_*_defer_3 */
262 m_panic_defer_3(struct scan * scanent, const uschar * hostport,
263 const uschar * str, int fd_to_close)
265 (void) close(fd_to_close);
266 return m_panic_defer(scanent, hostport, str);
269 /*************************************************/
271 #ifndef DISABLE_MAL_CLAM
272 /* Only used by the Clamav code, which is working from a list of servers and
273 uses the returned in_addr to get a second connection to the same system.
276 m_tcpsocket(const uschar * hostname, unsigned int port,
277 host_item * host, uschar ** errstr, const blob * fastopen_blob)
279 return ip_connectedsocket(SOCK_STREAM, hostname, port, port, 5,
280 host, errstr, fastopen_blob);
285 m_sock_send(int sock, uschar * buf, int cnt, uschar ** errstr)
287 if (send(sock, buf, cnt, 0) < 0)
291 *errstr = string_sprintf("unable to send to socket (%s): %s",
299 m_pcre_compile(const uschar * re, uschar ** errstr)
301 const uschar * rerror;
305 if (!(cre = pcre_compile(CS re, PCRE_COPT, CCSS &rerror, &roffset, NULL)))
306 *errstr= string_sprintf("regular expression error in '%s': %s at offset %d",
307 re, rerror, roffset);
312 m_pcre_exec(const pcre * cre, uschar * text)
315 int i = pcre_exec(cre, NULL, CS text, Ustrlen(text), 0, 0,
316 ovector, nelem(ovector));
317 uschar * substr = NULL;
318 if (i >= 2) /* Got it */
319 pcre_get_substring(CS text, ovector, i, 1, CCSS &substr);
324 m_pcre_nextinlist(const uschar ** list, int * sep,
325 char * listerr, uschar ** errstr)
327 const uschar * list_ele;
328 const pcre * cre = NULL;
330 if (!(list_ele = string_nextinlist(list, sep, NULL, 0)))
331 *errstr = US listerr;
334 DEBUG(D_acl) debug_printf_indent("%15s%10s'%s'\n", "", "RE: ",
335 string_printing(list_ele));
336 cre = m_pcre_compile(CUS list_ele, errstr);
342 Simple though inefficient wrapper for reading a line. Drop CRs and the
343 trailing newline. Can return early on buffer full. Null-terminate.
344 Apply initial timeout if no data ready.
346 Return: number of chars - zero for an empty line
348 -2 on timeout or error
351 recv_line(int fd, uschar * buffer, int bsize, time_t tmo)
357 if (!fd_ready(fd, tmo))
360 /*XXX tmo handling assumes we always get a whole line */
363 while ((rcv = read(fd, p, 1)) > 0)
366 if (p-buffer > bsize-2) break;
367 if (*p == '\n') break;
372 DEBUG(D_acl) debug_printf_indent("Malware scan: read %s (%s)\n",
373 rcv==0 ? "EOF" : "error", strerror(errno));
374 return rcv==0 ? -1 : -2;
378 DEBUG(D_acl) debug_printf_indent("Malware scan: read '%s'\n", buffer);
382 /* return TRUE iff size as requested */
384 recv_len(int sock, void * buf, int size, time_t tmo)
386 return fd_ready(sock, tmo)
387 ? recv(sock, buf, size, 0) == size
393 #ifndef DISABLE_MAL_MKS
394 /* ============= private routines for the "mksd" scanner type ============== */
396 # include <sys/uio.h>
399 mksd_writev (int sock, struct iovec * iov, int iovcnt)
406 i = writev (sock, iov, iovcnt);
407 while (i < 0 && errno == EINTR);
410 (void) malware_panic_defer(
411 US"unable to write to mksd UNIX socket (/var/run/mksd/socket)");
414 for (;;) /* check for short write */
415 if (i >= iov->iov_len)
425 iov->iov_base = CS iov->iov_base + i;
432 mksd_read_lines (int sock, uschar *av_buffer, int av_buffer_size, time_t tmo)
434 client_conn_ctx cctx = {.sock = sock};
440 i = ip_recv(&cctx, av_buffer+offset, av_buffer_size-offset, tmo);
443 (void) malware_panic_defer(US"unable to read from mksd UNIX socket (/var/run/mksd/socket)");
448 /* offset == av_buffer_size -> buffer full */
449 if (offset == av_buffer_size)
451 (void) malware_panic_defer(US"malformed reply received from mksd");
454 } while (av_buffer[offset-1] != '\n');
456 av_buffer[offset] = '\0';
461 mksd_parse_line(struct scan * scanent, char * line)
472 if ((p = strchr (line, '\n')) != NULL)
474 return m_panic_defer(scanent, NULL,
475 string_sprintf("scanner failed: %s", line));
478 if ((p = strchr (line, '\n')) != NULL)
483 && (p = strchr(line+4, ' ')) != NULL
488 malware_name = string_copy(US line+4);
492 return m_panic_defer(scanent, NULL,
493 string_sprintf("malformed reply received: %s", line));
498 mksd_scan_packed(struct scan * scanent, int sock, const uschar * scan_filename,
502 const char *cmd = "MSQ\n";
503 uschar av_buffer[1024];
505 iov[0].iov_base = (void *) cmd;
507 iov[1].iov_base = (void *) scan_filename;
508 iov[1].iov_len = Ustrlen(scan_filename);
509 iov[2].iov_base = (void *) (cmd + 3);
512 if (mksd_writev (sock, iov, 3) < 0)
515 if (mksd_read_lines (sock, av_buffer, sizeof (av_buffer), tmo) < 0)
518 return mksd_parse_line (scanent, CS av_buffer);
523 #ifndef DISABLE_MAL_CLAM
525 clamd_option(clamd_address * cd, const uschar * optstr, int * subsep)
530 while ((s = string_nextinlist(&optstr, subsep, NULL, 0)))
531 if (Ustrncmp(s, "retry=", 6) == 0)
533 int sec = readconf_readtime((s += 6), '\0', FALSE);
546 /*************************************************
547 * Scan content for malware *
548 *************************************************/
550 /* This is an internal interface for scanning an email; the normal interface
551 is via malware(), or there's malware_in_file() used for testing/debugging.
554 malware_re match condition for "malware="
555 scan_filename the file holding the email to be scanned, if we're faking
556 this up for the -bmalware test, else NULL
557 timeout if nonzero, non-default timeoutl
559 Returns: Exim message processing code (OK, FAIL, DEFER, ...)
560 where true means malware was found (condition applies)
563 malware_internal(const uschar * malware_re, const uschar * scan_filename,
567 const uschar *av_scanner_work = av_scanner;
568 uschar *scanner_name;
569 unsigned long mbox_size;
573 struct scan * scanent;
574 const uschar * scanner_options;
575 client_conn_ctx malware_daemon_ctx = {.sock = -1};
577 uschar * eml_filename, * eml_dir;
580 return FAIL; /* empty means "don't match anything" */
582 /* Ensure the eml mbox file is spooled up */
584 if (!(mbox_file = spool_mbox(&mbox_size, scan_filename, &eml_filename)))
585 return malware_panic_defer(US"error while creating mbox spool file");
587 /* None of our current scanners need the mbox file as a stream (they use
588 the name), so we can close it right away. Get the directory too. */
590 (void) fclose(mbox_file);
591 eml_dir = string_copyn(eml_filename, Ustrrchr(eml_filename, '/') - eml_filename);
593 /* parse 1st option */
594 if (strcmpic(malware_re, US"false") == 0 || Ustrcmp(malware_re,"0") == 0)
595 return FAIL; /* explicitly no matching */
597 /* special cases (match anything except empty) */
598 if ( strcmpic(malware_re,US"true") == 0
599 || Ustrcmp(malware_re,"*") == 0
600 || Ustrcmp(malware_re,"1") == 0
603 if ( !malware_default_re
604 && !(malware_default_re = m_pcre_compile(malware_regex_default, &errstr)))
605 return malware_panic_defer(errstr);
606 malware_re = malware_regex_default;
607 re = malware_default_re;
610 /* compile the regex, see if it works */
611 else if (!(re = m_pcre_compile(malware_re, &errstr)))
612 return malware_panic_defer(errstr);
614 /* if av_scanner starts with a dollar, expand it first */
615 if (*av_scanner == '$')
617 if (!(av_scanner_work = expand_string(av_scanner)))
618 return malware_panic_defer(
619 string_sprintf("av_scanner starts with $, but expansion failed: %s",
620 expand_string_message));
623 debug_printf_indent("Expanded av_scanner global: %s\n", av_scanner_work);
624 /* disable result caching in this case */
629 /* Do not scan twice (unless av_scanner is dynamic). */
632 /* find the scanner type from the av_scanner option */
633 if (!(scanner_name = string_nextinlist(&av_scanner_work, &sep, NULL, 0)))
634 return malware_panic_defer(US"av_scanner configuration variable is empty");
635 if (!timeout) timeout = MALWARE_TIMEOUT;
636 tmo = time(NULL) + timeout;
638 for (scanent = m_scans; ; scanent++)
641 return malware_panic_defer(string_sprintf("unknown scanner type '%s'",
643 if (strcmpic(scanner_name, US scanent->name) != 0)
645 DEBUG(D_acl) debug_printf_indent("Malware scan: %s tmo=%s\n",
646 scanner_name, readconf_printtime(timeout));
648 if (!(scanner_options = string_nextinlist(&av_scanner_work, &sep, NULL, 0)))
649 scanner_options = scanent->options_default;
650 if (scanent->conn == MC_NONE)
653 DEBUG(D_acl) debug_printf_indent("%15s%10s%s\n", "", "socket: ", scanner_options);
654 switch(scanent->conn)
657 malware_daemon_ctx.sock = ip_tcpsocket(scanner_options, &errstr, 5, NULL); break;
659 malware_daemon_ctx.sock = ip_unixsocket(scanner_options, &errstr); break;
661 malware_daemon_ctx.sock = ip_streamsocket(scanner_options, &errstr, 5, NULL); break;
663 /* compiler quietening */ break;
665 if (malware_daemon_ctx.sock < 0)
666 return m_panic_defer(scanent, CUS callout_address, errstr);
670 switch (scanent->scancode)
672 #ifndef DISABLE_MAL_FFROTD
673 case M_FPROTD: /* "f-protd" scanner type -------------------------------- */
675 uschar *fp_scan_option;
676 unsigned int detected=0, par_count=0;
677 uschar * scanrequest;
678 uschar buf[32768], *strhelper, *strhelper2;
679 uschar * malware_name_internal = NULL;
682 scanrequest = string_sprintf("GET %s", eml_filename);
684 while ((fp_scan_option = string_nextinlist(&av_scanner_work, &sep,
687 scanrequest = string_sprintf("%s%s%s", scanrequest,
688 par_count ? "%20" : "?", fp_scan_option);
691 scanrequest = string_sprintf("%s HTTP/1.0\r\n\r\n", scanrequest);
692 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s: %s\n",
693 scanner_name, scanrequest);
695 /* send scan request */
696 if (m_sock_send(malware_daemon_ctx.sock, scanrequest, Ustrlen(scanrequest)+1, &errstr) < 0)
697 return m_panic_defer(scanent, CUS callout_address, errstr);
699 while ((len = recv_line(malware_daemon_ctx.sock, buf, sizeof(buf), tmo)) >= 0)
702 if (Ustrstr(buf, US"<detected type=\"") != NULL)
704 else if (detected && (strhelper = Ustrstr(buf, US"<name>")))
706 if ((strhelper2 = Ustrstr(buf, US"</name>")) != NULL)
709 malware_name_internal = string_copy(strhelper+6);
712 else if (Ustrstr(buf, US"<summary code=\""))
714 malware_name = Ustrstr(buf, US"<summary code=\"11\">")
715 ? malware_name_internal : NULL;
721 (void)close(malware_daemon_ctx.sock);
728 #ifndef DISABLE_MAL_FFROT6D
729 case M_FPROT6D: /* "f-prot6d" scanner type ----------------------------------- */
734 uschar * scanrequest;
735 uschar av_buffer[1024];
737 if ((!fprot6d_re_virus && !(fprot6d_re_virus = m_pcre_compile(fprot6d_re_virus_str, &errstr)))
738 || (!fprot6d_re_error && !(fprot6d_re_error = m_pcre_compile(fprot6d_re_error_str, &errstr))))
739 return malware_panic_defer(errstr);
741 scanrequest = string_sprintf("SCAN FILE %s\n", eml_filename);
742 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s: %s\n",
743 scanner_name, scanrequest);
745 if (m_sock_send(malware_daemon_ctx.sock, scanrequest, Ustrlen(scanrequest), &errstr) < 0)
746 return m_panic_defer(scanent, CUS callout_address, errstr);
748 bread = ip_recv(&malware_daemon_ctx, av_buffer, sizeof(av_buffer), tmo);
751 return m_panic_defer_3(scanent, CUS callout_address,
752 string_sprintf("unable to read from socket (%s)", strerror(errno)),
753 malware_daemon_ctx.sock);
755 if (bread == sizeof(av_buffer))
756 return m_panic_defer_3(scanent, CUS callout_address,
757 US"buffer too small", malware_daemon_ctx.sock);
759 av_buffer[bread] = '\0';
760 linebuffer = string_copy(av_buffer);
762 m_sock_send(malware_daemon_ctx.sock, US"QUIT\n", 5, 0);
764 if ((e = m_pcre_exec(fprot6d_re_error, linebuffer)))
765 return m_panic_defer_3(scanent, CUS callout_address,
766 string_sprintf("scanner reported error (%s)", e), malware_daemon_ctx.sock);
768 if (!(malware_name = m_pcre_exec(fprot6d_re_virus, linebuffer)))
775 #ifndef DISABLE_MAL_DRWEB
776 case M_DRWEB: /* "drweb" scanner type ----------------------------------- */
777 /* v0.1 - added support for tcp sockets */
778 /* v0.0 - initial release -- support for unix sockets */
782 unsigned int fsize_uint;
783 uschar * tmpbuf, *drweb_fbuf;
784 int drweb_rc, drweb_cmd, drweb_flags = 0x0000, drweb_fd,
785 drweb_vnum, drweb_slen, drweb_fin = 0x0000;
787 /* prepare variables */
788 drweb_cmd = htonl(DRWEBD_SCAN_CMD);
789 drweb_flags = htonl(DRWEBD_RETURN_VIRUSES | DRWEBD_IS_MAIL);
791 if (*scanner_options != '/')
794 if ((drweb_fd = exim_open2(CCS eml_filename, O_RDONLY)) == -1)
795 return m_panic_defer_3(scanent, NULL,
796 string_sprintf("can't open spool file %s: %s",
797 eml_filename, strerror(errno)),
798 malware_daemon_ctx.sock);
800 if ((fsize = lseek(drweb_fd, 0, SEEK_END)) == -1)
803 badseek: err = errno;
804 (void)close(drweb_fd);
805 return m_panic_defer_3(scanent, NULL,
806 string_sprintf("can't seek spool file %s: %s",
807 eml_filename, strerror(err)),
808 malware_daemon_ctx.sock);
810 fsize_uint = (unsigned int) fsize;
811 if ((off_t)fsize_uint != fsize)
813 (void)close(drweb_fd);
814 return m_panic_defer_3(scanent, NULL,
815 string_sprintf("seeking spool file %s, size overflow",
817 malware_daemon_ctx.sock);
819 drweb_slen = htonl(fsize);
820 if (lseek(drweb_fd, 0, SEEK_SET) < 0)
823 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s remote scan [%s]\n",
824 scanner_name, scanner_options);
826 /* send scan request */
827 if ((send(malware_daemon_ctx.sock, &drweb_cmd, sizeof(drweb_cmd), 0) < 0) ||
828 (send(malware_daemon_ctx.sock, &drweb_flags, sizeof(drweb_flags), 0) < 0) ||
829 (send(malware_daemon_ctx.sock, &drweb_fin, sizeof(drweb_fin), 0) < 0) ||
830 (send(malware_daemon_ctx.sock, &drweb_slen, sizeof(drweb_slen), 0) < 0))
832 (void)close(drweb_fd);
833 return m_panic_defer_3(scanent, CUS callout_address, string_sprintf(
834 "unable to send commands to socket (%s)", scanner_options),
835 malware_daemon_ctx.sock);
838 if (!(drweb_fbuf = store_malloc(fsize_uint)))
840 (void)close(drweb_fd);
841 return m_panic_defer_3(scanent, NULL,
842 string_sprintf("unable to allocate memory %u for file (%s)",
843 fsize_uint, eml_filename),
844 malware_daemon_ctx.sock);
847 if ((result = read (drweb_fd, drweb_fbuf, fsize)) == -1)
850 (void)close(drweb_fd);
851 store_free(drweb_fbuf);
852 return m_panic_defer_3(scanent, NULL,
853 string_sprintf("can't read spool file %s: %s",
854 eml_filename, strerror(err)),
855 malware_daemon_ctx.sock);
857 (void)close(drweb_fd);
859 /* send file body to socket */
860 if (send(malware_daemon_ctx.sock, drweb_fbuf, fsize, 0) < 0)
862 store_free(drweb_fbuf);
863 return m_panic_defer_3(scanent, CUS callout_address, string_sprintf(
864 "unable to send file body to socket (%s)", scanner_options),
865 malware_daemon_ctx.sock);
867 store_free(drweb_fbuf);
871 drweb_slen = htonl(Ustrlen(eml_filename));
873 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s local scan [%s]\n",
874 scanner_name, scanner_options);
876 /* send scan request */
877 if ((send(malware_daemon_ctx.sock, &drweb_cmd, sizeof(drweb_cmd), 0) < 0) ||
878 (send(malware_daemon_ctx.sock, &drweb_flags, sizeof(drweb_flags), 0) < 0) ||
879 (send(malware_daemon_ctx.sock, &drweb_slen, sizeof(drweb_slen), 0) < 0) ||
880 (send(malware_daemon_ctx.sock, eml_filename, Ustrlen(eml_filename), 0) < 0) ||
881 (send(malware_daemon_ctx.sock, &drweb_fin, sizeof(drweb_fin), 0) < 0))
882 return m_panic_defer_3(scanent, CUS callout_address, string_sprintf(
883 "unable to send commands to socket (%s)", scanner_options),
884 malware_daemon_ctx.sock);
887 /* wait for result */
888 if (!recv_len(malware_daemon_ctx.sock, &drweb_rc, sizeof(drweb_rc), tmo))
889 return m_panic_defer_3(scanent, CUS callout_address,
890 US"unable to read return code", malware_daemon_ctx.sock);
891 drweb_rc = ntohl(drweb_rc);
893 if (!recv_len(malware_daemon_ctx.sock, &drweb_vnum, sizeof(drweb_vnum), tmo))
894 return m_panic_defer_3(scanent, CUS callout_address,
895 US"unable to read the number of viruses", malware_daemon_ctx.sock);
896 drweb_vnum = ntohl(drweb_vnum);
898 /* "virus(es) found" if virus number is > 0 */
903 /* setup default virus name */
904 malware_name = US"unknown";
906 /* set up match regex */
908 drweb_re = m_pcre_compile(drweb_re_str, &errstr);
910 /* read and concatenate virus names into one string */
911 for (int i = 0; i < drweb_vnum; i++)
915 /* read the size of report */
916 if (!recv_len(malware_daemon_ctx.sock, &drweb_slen, sizeof(drweb_slen), tmo))
917 return m_panic_defer_3(scanent, CUS callout_address,
918 US"cannot read report size", malware_daemon_ctx.sock);
919 drweb_slen = ntohl(drweb_slen);
921 /* assume tainted, since it is external input */
922 tmpbuf = store_get(drweb_slen, TRUE);
924 /* read report body */
925 if (!recv_len(malware_daemon_ctx.sock, tmpbuf, drweb_slen, tmo))
926 return m_panic_defer_3(scanent, CUS callout_address,
927 US"cannot read report string", malware_daemon_ctx.sock);
928 tmpbuf[drweb_slen] = '\0';
930 /* try matcher on the line, grab substring */
931 result = pcre_exec(drweb_re, NULL, CS tmpbuf, Ustrlen(tmpbuf), 0, 0,
932 ovector, nelem(ovector));
935 const char * pre_malware_nb;
937 pcre_get_substring(CS tmpbuf, ovector, result, 1, &pre_malware_nb);
939 if (i==0) /* the first name we just copy to malware_name */
940 g = string_cat(NULL, US pre_malware_nb);
942 /*XXX could be string_append_listele? */
943 else /* concatenate each new virus name to previous */
944 g = string_append(g, 2, "/", pre_malware_nb);
946 pcre_free_substring(pre_malware_nb);
949 malware_name = string_from_gstring(g);
953 const char *drweb_s = NULL;
955 if (drweb_rc & DERR_READ_ERR) drweb_s = "read error";
956 if (drweb_rc & DERR_NOMEMORY) drweb_s = "no memory";
957 if (drweb_rc & DERR_TIMEOUT) drweb_s = "timeout";
958 if (drweb_rc & DERR_BAD_CALL) drweb_s = "wrong command";
959 /* retcodes DERR_SYMLINK, DERR_NO_REGFILE, DERR_SKIPPED.
960 * DERR_TOO_BIG, DERR_TOO_COMPRESSED, DERR_SPAM,
961 * DERR_CRC_ERROR, DERR_READSOCKET, DERR_WRITE_ERR
962 * and others are ignored */
964 return m_panic_defer_3(scanent, CUS callout_address,
965 string_sprintf("drweb daemon retcode 0x%x (%s)", drweb_rc, drweb_s),
966 malware_daemon_ctx.sock);
975 #ifndef DISABLE_MAL_AVE
976 case M_AVES: /* "aveserver" scanner type -------------------------------- */
981 /* read aveserver's greeting and see if it is ready (2xx greeting) */
983 recv_line(malware_daemon_ctx.sock, buf, sizeof(buf), tmo);
985 if (buf[0] != '2') /* aveserver is having problems */
986 return m_panic_defer_3(scanent, CUS callout_address,
987 string_sprintf("unavailable (Responded: %s).",
988 ((buf[0] != 0) ? buf : US "nothing") ),
989 malware_daemon_ctx.sock);
991 /* prepare our command */
992 (void)string_format(buf, sizeof(buf), "SCAN bPQRSTUW %s\r\n",
996 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s %s\n",
998 if (m_sock_send(malware_daemon_ctx.sock, buf, Ustrlen(buf), &errstr) < 0)
999 return m_panic_defer(scanent, CUS callout_address, errstr);
1001 malware_name = NULL;
1003 /* read response lines, find malware name and final response */
1004 while (recv_line(malware_daemon_ctx.sock, buf, sizeof(buf), tmo) > 0)
1008 if (buf[0] == '5') /* aveserver is having problems */
1010 result = m_panic_defer(scanent, CUS callout_address,
1011 string_sprintf("unable to scan file %s (Responded: %s).",
1012 eml_filename, buf));
1015 if (Ustrncmp(buf,"322",3) == 0)
1017 uschar *p = Ustrchr(&buf[4], ' ');
1019 malware_name = string_copy(&buf[4]);
1023 if (m_sock_send(malware_daemon_ctx.sock, US"quit\r\n", 6, &errstr) < 0)
1024 return m_panic_defer(scanent, CUS callout_address, errstr);
1026 /* read aveserver's greeting and see if it is ready (2xx greeting) */
1028 recv_line(malware_daemon_ctx.sock, buf, sizeof(buf), tmo);
1030 if (buf[0] != '2') /* aveserver is having problems */
1031 return m_panic_defer_3(scanent, CUS callout_address,
1032 string_sprintf("unable to quit dialogue (Responded: %s).",
1033 ((buf[0] != 0) ? buf : US "nothing") ),
1034 malware_daemon_ctx.sock);
1036 if (result == DEFER)
1038 (void)close(malware_daemon_ctx.sock);
1045 #ifndef DISABLE_MAL_FSECURE
1046 case M_FSEC: /* "fsecure" scanner type ---------------------------------- */
1050 uschar av_buffer[1024];
1051 static uschar *cmdopt[] = { US"CONFIGURE\tARCHIVE\t1\n",
1052 US"CONFIGURE\tTIMEOUT\t0\n",
1053 US"CONFIGURE\tMAXARCH\t5\n",
1054 US"CONFIGURE\tMIME\t1\n" };
1056 malware_name = NULL;
1058 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s scan [%s]\n",
1059 scanner_name, scanner_options);
1061 memset(av_buffer, 0, sizeof(av_buffer));
1062 for (i = 0; i != nelem(cmdopt); i++)
1065 if (m_sock_send(malware_daemon_ctx.sock, cmdopt[i], Ustrlen(cmdopt[i]), &errstr) < 0)
1066 return m_panic_defer(scanent, CUS callout_address, errstr);
1068 bread = ip_recv(&malware_daemon_ctx, av_buffer, sizeof(av_buffer), tmo);
1069 if (bread > 0) av_buffer[bread]='\0';
1071 return m_panic_defer_3(scanent, CUS callout_address,
1072 string_sprintf("unable to read answer %d (%s)", i, strerror(errno)),
1073 malware_daemon_ctx.sock);
1074 for (int j = 0; j < bread; j++)
1075 if (av_buffer[j] == '\r' || av_buffer[j] == '\n')
1079 /* pass the mailfile to fsecure */
1080 file_name = string_sprintf("SCAN\t%s\n", eml_filename);
1082 if (m_sock_send(malware_daemon_ctx.sock, file_name, Ustrlen(file_name), &errstr) < 0)
1083 return m_panic_defer(scanent, CUS callout_address, errstr);
1086 /* todo also SUSPICION\t */
1088 fsec_re = m_pcre_compile(fsec_re_str, &errstr);
1090 /* read report, linewise. Apply a timeout as the Fsecure daemon
1091 sometimes wants an answer to "PING" but they won't tell us what */
1093 uschar * p = av_buffer;
1099 i = av_buffer+sizeof(av_buffer)-p;
1100 if ((bread= ip_recv(&malware_daemon_ctx, p, i-1, tmo)) < 0)
1101 return m_panic_defer_3(scanent, CUS callout_address,
1102 string_sprintf("unable to read result (%s)", strerror(errno)),
1103 malware_daemon_ctx.sock);
1105 for (p[bread] = '\0'; (q = Ustrchr(p, '\n')); p = q+1)
1109 /* Really search for virus again? */
1111 /* try matcher on the line, grab substring */
1112 malware_name = m_pcre_exec(fsec_re, p);
1114 if (Ustrstr(p, "OK\tScan ok."))
1118 /* copy down the trailing partial line then read another chunk */
1119 i = av_buffer+sizeof(av_buffer)-p;
1120 memmove(av_buffer, p, i);
1130 #ifndef DISABLE_MAL_KAV
1131 case M_KAVD: /* "kavdaemon" scanner type -------------------------------- */
1134 uschar tmpbuf[1024];
1135 uschar * scanrequest;
1137 unsigned long kav_reportlen;
1142 /* get current date and time, build scan request */
1144 /* pdp note: before the eml_filename parameter, this scanned the
1145 directory; not finding documentation, so we'll strip off the directory.
1146 The side-effect is that the test framework scanning may end up in
1147 scanning more than was requested, but for the normal interface, this is
1150 strftime(CS tmpbuf, sizeof(tmpbuf), "%d %b %H:%M:%S", localtime(&t));
1151 scanrequest = string_sprintf("<0>%s:%s", CS tmpbuf, eml_filename);
1152 p = Ustrrchr(scanrequest, '/');
1156 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s scan [%s]\n",
1157 scanner_name, scanner_options);
1159 /* send scan request */
1160 if (m_sock_send(malware_daemon_ctx.sock, scanrequest, Ustrlen(scanrequest)+1, &errstr) < 0)
1161 return m_panic_defer(scanent, CUS callout_address, errstr);
1163 /* wait for result */
1164 if (!recv_len(malware_daemon_ctx.sock, tmpbuf, 2, tmo))
1165 return m_panic_defer_3(scanent, CUS callout_address,
1166 US"unable to read 2 bytes from socket.", malware_daemon_ctx.sock);
1168 /* get errorcode from one nibble */
1169 kav_rc = tmpbuf[ test_byte_order()==LITTLE_MY_ENDIAN ? 0 : 1 ] & 0x0F;
1172 case 5: case 6: /* improper kavdaemon configuration */
1173 return m_panic_defer_3(scanent, CUS callout_address,
1174 US"please reconfigure kavdaemon to NOT disinfect or remove infected files.",
1175 malware_daemon_ctx.sock);
1177 return m_panic_defer_3(scanent, CUS callout_address,
1178 US"reported 'scanning not completed' (code 1).", malware_daemon_ctx.sock);
1180 return m_panic_defer_3(scanent, CUS callout_address,
1181 US"reported 'kavdaemon damaged' (code 7).", malware_daemon_ctx.sock);
1184 /* code 8 is not handled, since it is ambiguous. It appears mostly on
1185 bounces where part of a file has been cut off */
1187 /* "virus found" return codes (2-4) */
1188 if (kav_rc > 1 && kav_rc < 5)
1190 int report_flag = 0;
1192 /* setup default virus name */
1193 malware_name = US"unknown";
1195 report_flag = tmpbuf[ test_byte_order() == LITTLE_MY_ENDIAN ? 1 : 0 ];
1197 /* read the report, if available */
1198 if (report_flag == 1)
1200 /* read report size */
1201 if (!recv_len(malware_daemon_ctx.sock, &kav_reportlen, 4, tmo))
1202 return m_panic_defer_3(scanent, CUS callout_address,
1203 US"cannot read report size", malware_daemon_ctx.sock);
1205 /* it's possible that avp returns av_buffer[1] == 1 but the
1206 reportsize is 0 (!?) */
1207 if (kav_reportlen > 0)
1209 /* set up match regex, depends on retcode */
1212 if (!kav_re_sus) kav_re_sus = m_pcre_compile(kav_re_sus_str, &errstr);
1213 kav_re = kav_re_sus;
1217 if (!kav_re_inf) kav_re_inf = m_pcre_compile(kav_re_inf_str, &errstr);
1218 kav_re = kav_re_inf;
1221 /* read report, linewise. Using size from stream to read amount of data
1222 from same stream is safe enough. */
1223 /* coverity[tainted_data] */
1224 while (kav_reportlen > 0)
1226 if ((bread = recv_line(malware_daemon_ctx.sock, tmpbuf, sizeof(tmpbuf), tmo)) < 0)
1228 kav_reportlen -= bread+1;
1230 /* try matcher on the line, grab substring */
1231 if ((malware_name = m_pcre_exec(kav_re, tmpbuf)))
1237 else /* no virus found */
1238 malware_name = NULL;
1244 #ifndef DISABLE_MAL_CMDLINE
1245 case M_CMDL: /* "cmdline" scanner type ---------------------------------- */
1247 const uschar *cmdline_scanner = scanner_options;
1248 const pcre *cmdline_trigger_re;
1249 const pcre *cmdline_regex_re;
1251 uschar * commandline;
1252 void (*eximsigchld)(int);
1253 void (*eximsigpipe)(int);
1254 FILE *scanner_out = NULL;
1256 FILE *scanner_record = NULL;
1257 uschar linebuffer[32767];
1262 if (!cmdline_scanner)
1263 return m_panic_defer(scanent, NULL, errstr);
1265 /* find scanner output trigger */
1266 cmdline_trigger_re = m_pcre_nextinlist(&av_scanner_work, &sep,
1267 "missing trigger specification", &errstr);
1268 if (!cmdline_trigger_re)
1269 return m_panic_defer(scanent, NULL, errstr);
1271 /* find scanner name regex */
1272 cmdline_regex_re = m_pcre_nextinlist(&av_scanner_work, &sep,
1273 "missing virus name regex specification", &errstr);
1274 if (!cmdline_regex_re)
1275 return m_panic_defer(scanent, NULL, errstr);
1277 /* prepare scanner call; despite the naming, file_name holds a directory
1278 name which is documented as the value given to %s. */
1280 file_name = string_copy(eml_filename);
1281 p = Ustrrchr(file_name, '/');
1284 commandline = string_sprintf(CS cmdline_scanner, file_name);
1286 /* redirect STDERR too */
1287 commandline = string_sprintf("%s 2>&1", commandline);
1289 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s scan [%s]\n",
1290 scanner_name, commandline);
1292 /* store exims signal handlers */
1293 eximsigchld = signal(SIGCHLD,SIG_DFL);
1294 eximsigpipe = signal(SIGPIPE,SIG_DFL);
1296 if (!(scanner_out = popen(CS commandline,"r")))
1299 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1300 return m_panic_defer(scanent, NULL,
1301 string_sprintf("call (%s) failed: %s.", commandline, strerror(err)));
1303 scanner_fd = fileno(scanner_out);
1305 file_name = string_sprintf("%s/%s_scanner_output", eml_dir, message_id);
1307 if (!(scanner_record = modefopen(file_name, "wb", SPOOL_MODE)))
1310 (void) pclose(scanner_out);
1311 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1312 return m_panic_defer(scanent, NULL, string_sprintf(
1313 "opening scanner output file (%s) failed: %s.",
1314 file_name, strerror(err)));
1317 /* look for trigger while recording output */
1318 while ((rcnt = recv_line(scanner_fd, linebuffer,
1319 sizeof(linebuffer), tmo)))
1326 (void) pclose(scanner_out);
1327 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1328 return m_panic_defer(scanent, NULL, string_sprintf(
1329 "unable to read from scanner (%s): %s",
1330 commandline, strerror(err)));
1333 if (Ustrlen(linebuffer) > fwrite(linebuffer, 1, Ustrlen(linebuffer), scanner_record))
1336 (void) pclose(scanner_out);
1337 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1338 return m_panic_defer(scanent, NULL, string_sprintf(
1339 "short write on scanner output file (%s).", file_name));
1341 putc('\n', scanner_record);
1342 /* try trigger match */
1344 && regex_match_and_setup(cmdline_trigger_re, linebuffer, 0, -1)
1349 (void)fclose(scanner_record);
1350 sep = pclose(scanner_out);
1351 signal(SIGCHLD,eximsigchld); signal(SIGPIPE,eximsigpipe);
1353 return m_panic_defer(scanent, NULL,
1355 ? string_sprintf("running scanner failed: %s", strerror(sep))
1356 : string_sprintf("scanner returned error code: %d", sep));
1361 /* setup default virus name */
1362 malware_name = US"unknown";
1364 /* re-open the scanner output file, look for name match */
1365 scanner_record = Ufopen(file_name, "rb");
1366 while (Ufgets(linebuffer, sizeof(linebuffer), scanner_record))
1367 if ((s = m_pcre_exec(cmdline_regex_re, linebuffer))) /* try match */
1369 (void)fclose(scanner_record);
1371 else /* no virus found */
1372 malware_name = NULL;
1377 #ifndef DISABLE_MAL_SOPHIE
1378 case M_SOPHIE: /* "sophie" scanner type --------------------------------- */
1383 uschar av_buffer[1024];
1385 /* pass the scan directory to sophie */
1386 file_name = string_copy(eml_filename);
1387 if ((p = Ustrrchr(file_name, '/')))
1390 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s scan [%s]\n",
1391 scanner_name, scanner_options);
1393 if ( write(malware_daemon_ctx.sock, file_name, Ustrlen(file_name)) < 0
1394 || write(malware_daemon_ctx.sock, "\n", 1) != 1
1396 return m_panic_defer_3(scanent, CUS callout_address,
1397 string_sprintf("unable to write to UNIX socket (%s)", scanner_options),
1398 malware_daemon_ctx.sock);
1400 /* wait for result */
1401 memset(av_buffer, 0, sizeof(av_buffer));
1402 if ((bread = ip_recv(&malware_daemon_ctx, av_buffer, sizeof(av_buffer), tmo)) <= 0)
1403 return m_panic_defer_3(scanent, CUS callout_address,
1404 string_sprintf("unable to read from UNIX socket (%s)", scanner_options),
1405 malware_daemon_ctx.sock);
1408 if (av_buffer[0] == '1') {
1409 uschar * s = Ustrchr(av_buffer, '\n');
1412 malware_name = string_copy(&av_buffer[2]);
1414 else if (!strncmp(CS av_buffer, "-1", 2))
1415 return m_panic_defer_3(scanent, CUS callout_address,
1416 US"scanner reported error", malware_daemon_ctx.sock);
1417 else /* all ok, no virus */
1418 malware_name = NULL;
1424 #ifndef DISABLE_MAL_CLAM
1425 case M_CLAMD: /* "clamd" scanner type ----------------------------------- */
1427 /* This code was originally contributed by David Saez */
1428 /* There are three scanning methods available to us:
1429 * (1) Use the SCAN command, pointing to a file in the filesystem
1430 * (2) Use the STREAM command, send the data on a separate port
1431 * (3) Use the zINSTREAM command, send the data inline
1432 * The zINSTREAM command was introduced with ClamAV 0.95, which marked
1433 * STREAM deprecated; see: http://wiki.clamav.net/bin/view/Main/UpgradeNotes095
1434 * In Exim, we use SCAN if using a Unix-domain socket or explicitly told that
1435 * the TCP-connected daemon is actually local; otherwise we use zINSTREAM
1436 * See Exim bug 926 for details. */
1438 uschar *p, *vname, *result_tag;
1440 uschar av_buffer[1024];
1441 uschar *hostname = US"";
1443 uschar *clamav_fbuf;
1444 int clam_fd, result;
1446 unsigned int fsize_uint;
1447 BOOL use_scan_command = FALSE;
1448 clamd_address * cv[MAX_CLAMD_SERVERS];
1449 int num_servers = 0;
1450 uint32_t send_size, send_final_zeroblock;
1453 /*XXX if unixdomain socket, only one server supported. Needs fixing;
1454 there's no reason we should not mix local and remote servers */
1456 if (*scanner_options == '/')
1459 const uschar * sublist;
1462 /* Local file; so we def want to use_scan_command and don't want to try
1463 * passing IP/port combinations */
1464 use_scan_command = TRUE;
1465 cd = (clamd_address *) store_get(sizeof(clamd_address), FALSE);
1467 /* extract socket-path part */
1468 sublist = scanner_options;
1469 cd->hostspec = string_nextinlist(&sublist, &subsep, NULL, 0);
1472 if (clamd_option(cd, sublist, &subsep) != OK)
1473 return m_panic_defer(scanent, NULL,
1474 string_sprintf("bad option '%s'", scanner_options));
1479 /* Go through the rest of the list of host/port and construct an array
1480 * of servers to try. The first one is the bit we just passed from
1481 * scanner_options so process that first and then scan the remainder of
1482 * the address buffer */
1486 const uschar * sublist;
1490 /* The 'local' option means use the SCAN command over the network
1491 * socket (ie common file storage in use) */
1492 /*XXX we could accept this also as a local option? */
1493 if (strcmpic(scanner_options, US"local") == 0)
1495 use_scan_command = TRUE;
1499 cd = (clamd_address *) store_get(sizeof(clamd_address), FALSE);
1501 /* extract host and port part */
1502 sublist = scanner_options;
1503 if (!(cd->hostspec = string_nextinlist(&sublist, &subsep, NULL, 0)))
1505 (void) m_panic_defer(scanent, NULL,
1506 string_sprintf("missing address: '%s'", scanner_options));
1509 if (!(s = string_nextinlist(&sublist, &subsep, NULL, 0)))
1511 (void) m_panic_defer(scanent, NULL,
1512 string_sprintf("missing port: '%s'", scanner_options));
1515 cd->tcp_port = atoi(CS s);
1518 /*XXX should these options be common over scanner types? */
1519 if (clamd_option(cd, sublist, &subsep) != OK)
1520 return m_panic_defer(scanent, NULL,
1521 string_sprintf("bad option '%s'", scanner_options));
1523 cv[num_servers++] = cd;
1524 if (num_servers >= MAX_CLAMD_SERVERS)
1526 (void) m_panic_defer(scanent, NULL,
1527 US"More than " MAX_CLAMD_SERVERS_S " clamd servers "
1528 "specified; only using the first " MAX_CLAMD_SERVERS_S );
1531 } while ((scanner_options = string_nextinlist(&av_scanner_work, &sep,
1534 /* check if we have at least one server */
1536 return m_panic_defer(scanent, NULL,
1537 US"no useable server addresses in malware configuration option.");
1540 /* See the discussion of response formats below to see why we really
1541 don't like colons in filenames when passing filenames to ClamAV. */
1542 if (use_scan_command && Ustrchr(eml_filename, ':'))
1543 return m_panic_defer(scanent, NULL,
1544 string_sprintf("local/SCAN mode incompatible with" \
1545 " : in path to email filename [%s]", eml_filename));
1547 /* Set up the very first data we will be sending */
1548 if (!use_scan_command)
1549 { cmd_str.data = US"zINSTREAM"; cmd_str.len = 10; }
1552 cmd_str.data = string_sprintf("SCAN %s\n", eml_filename);
1553 cmd_str.len = Ustrlen(cmd_str.data);
1556 /* We have some network servers specified */
1559 /* Confirmed in ClamAV source (0.95.3) that the TCPAddr option of clamd
1560 * only supports AF_INET, but we should probably be looking to the
1561 * future and rewriting this to be protocol-independent anyway. */
1563 while (num_servers > 0)
1565 int i = random_number(num_servers);
1566 clamd_address * cd = cv[i];
1568 DEBUG(D_acl) debug_printf_indent("trying server name %s, port %u\n",
1569 cd->hostspec, cd->tcp_port);
1571 /* Lookup the host. This is to ensure that we connect to the same IP
1572 * on both connections (as one host could resolve to multiple ips) */
1575 /*XXX we trust that the cmd_str is ideempotent */
1576 if ((malware_daemon_ctx.sock = m_tcpsocket(cd->hostspec, cd->tcp_port,
1577 &connhost, &errstr, &cmd_str)) >= 0)
1579 /* Connection successfully established with a server */
1580 hostname = cd->hostspec;
1584 if (cd->retry <= 0) break;
1585 while (cd->retry > 0) cd->retry = sleep(cd->retry);
1587 if (malware_daemon_ctx.sock >= 0)
1590 (void) m_panic_defer(scanent, CUS callout_address, errstr);
1592 /* Remove the server from the list. XXX We should free the memory */
1594 for (; i < num_servers; i++)
1598 if (num_servers == 0)
1599 return m_panic_defer(scanent, NULL, US"all servers failed");
1604 if ((malware_daemon_ctx.sock = ip_unixsocket(cv[0]->hostspec, &errstr)) >= 0)
1606 hostname = cv[0]->hostspec;
1609 if (cv[0]->retry <= 0)
1610 return m_panic_defer(scanent, CUS callout_address, errstr);
1611 while (cv[0]->retry > 0) cv[0]->retry = sleep(cv[0]->retry);
1614 /* have socket in variable "sock"; command to use is semi-independent of
1615 * the socket protocol. We use SCAN if is local (either Unix/local
1616 * domain socket, or explicitly told local) else we stream the data.
1617 * How we stream the data depends upon how we were built. */
1619 if (!use_scan_command)
1621 /* New protocol: "zINSTREAM\n" followed by a sequence of <length><data>
1622 chunks, <n> a 4-byte number (network order), terminated by a zero-length
1625 DEBUG(D_acl) debug_printf_indent(
1626 "Malware scan: issuing %s new-style remote scan (zINSTREAM)\n",
1629 /* Pass the string to ClamAV (10 = "zINSTREAM\0"), if not already sent */
1631 if (send(malware_daemon_ctx.sock, cmd_str.data, cmd_str.len, 0) < 0)
1632 return m_panic_defer_3(scanent, CUS hostname,
1633 string_sprintf("unable to send zINSTREAM to socket (%s)",
1635 malware_daemon_ctx.sock);
1637 /* calc file size */
1638 if ((clam_fd = exim_open2(CS eml_filename, O_RDONLY)) < 0)
1641 return m_panic_defer_3(scanent, NULL,
1642 string_sprintf("can't open spool file %s: %s",
1643 eml_filename, strerror(err)),
1644 malware_daemon_ctx.sock);
1646 if ((fsize = lseek(clam_fd, 0, SEEK_END)) < 0)
1649 b_seek: err = errno;
1650 (void)close(clam_fd);
1651 return m_panic_defer_3(scanent, NULL,
1652 string_sprintf("can't seek spool file %s: %s",
1653 eml_filename, strerror(err)),
1654 malware_daemon_ctx.sock);
1656 fsize_uint = (unsigned int) fsize;
1657 if ((off_t)fsize_uint != fsize)
1659 (void)close(clam_fd);
1660 return m_panic_defer_3(scanent, NULL,
1661 string_sprintf("seeking spool file %s, size overflow",
1663 malware_daemon_ctx.sock);
1665 if (lseek(clam_fd, 0, SEEK_SET) < 0)
1668 if (!(clamav_fbuf = store_malloc(fsize_uint)))
1670 (void)close(clam_fd);
1671 return m_panic_defer_3(scanent, NULL,
1672 string_sprintf("unable to allocate memory %u for file (%s)",
1673 fsize_uint, eml_filename),
1674 malware_daemon_ctx.sock);
1677 if ((result = read(clam_fd, clamav_fbuf, fsize_uint)) < 0)
1680 store_free(clamav_fbuf); (void)close(clam_fd);
1681 return m_panic_defer_3(scanent, NULL,
1682 string_sprintf("can't read spool file %s: %s",
1683 eml_filename, strerror(err)),
1684 malware_daemon_ctx.sock);
1686 (void)close(clam_fd);
1688 /* send file body to socket */
1689 send_size = htonl(fsize_uint);
1690 send_final_zeroblock = 0;
1691 if ((send(malware_daemon_ctx.sock, &send_size, sizeof(send_size), 0) < 0) ||
1692 (send(malware_daemon_ctx.sock, clamav_fbuf, fsize_uint, 0) < 0) ||
1693 (send(malware_daemon_ctx.sock, &send_final_zeroblock, sizeof(send_final_zeroblock), 0) < 0))
1695 store_free(clamav_fbuf);
1696 return m_panic_defer_3(scanent, NULL,
1697 string_sprintf("unable to send file body to socket (%s)", hostname),
1698 malware_daemon_ctx.sock);
1700 store_free(clamav_fbuf);
1703 { /* use scan command */
1704 /* Send a SCAN command pointing to a filename; then in the then in the
1705 * scan-method-neutral part, read the response back */
1707 /* ================================================================= */
1709 /* Prior to the reworking post-Exim-4.72, this scanned a directory,
1710 which dates to when ClamAV needed us to break apart the email into the
1711 MIME parts (eg, with the now deprecated demime condition coming first).
1712 Some time back, ClamAV gained the ability to deconstruct the emails, so
1713 doing this would actually have resulted in the mail attachments being
1714 scanned twice, in the broken out files and from the original .eml.
1715 Since ClamAV now handles emails (and has for quite some time) we can
1716 just use the email file itself. */
1717 /* Pass the string to ClamAV (7 = "SCAN \n" + \0), if not already sent */
1719 DEBUG(D_acl) debug_printf_indent(
1720 "Malware scan: issuing %s local-path scan [%s]\n",
1721 scanner_name, scanner_options);
1724 if (send(malware_daemon_ctx.sock, cmd_str.data, cmd_str.len, 0) < 0)
1725 return m_panic_defer_3(scanent, CUS callout_address,
1726 string_sprintf("unable to write to socket (%s)", strerror(errno)),
1727 malware_daemon_ctx.sock);
1729 /* Do not shut down the socket for writing; a user report noted that
1730 * clamd 0.70 does not react well to this. */
1732 /* Commands have been sent, no matter which scan method or connection
1733 * type we're using; now just read the result, independent of method. */
1735 /* Read the result */
1736 memset(av_buffer, 0, sizeof(av_buffer));
1737 bread = ip_recv(&malware_daemon_ctx, av_buffer, sizeof(av_buffer), tmo);
1738 (void)close(malware_daemon_ctx.sock);
1739 malware_daemon_ctx.sock = -1;
1740 malware_daemon_ctx.tls_ctx = NULL;
1743 return m_panic_defer(scanent, CUS callout_address,
1744 string_sprintf("unable to read from socket (%s)",
1745 errno == 0 ? "EOF" : strerror(errno)));
1747 if (bread == sizeof(av_buffer))
1748 return m_panic_defer(scanent, CUS callout_address,
1749 US"buffer too small");
1750 /* We're now assured of a NULL at the end of av_buffer */
1752 /* Check the result. ClamAV returns one of two result formats.
1753 In the basic mode, the response is of the form:
1754 infected: -> "<filename>: <virusname> FOUND"
1755 not-infected: -> "<filename>: OK"
1756 error: -> "<filename>: <errcode> ERROR
1757 If the ExtendedDetectionInfo option has been turned on, then we get:
1758 "<filename>: <virusname>(<virushash>:<virussize>) FOUND"
1759 for the infected case. Compare:
1760 /tmp/eicar.com: Eicar-Test-Signature FOUND
1761 /tmp/eicar.com: Eicar-Test-Signature(44d88612fea8a8f36de82e1278abb02f:68) FOUND
1763 In the streaming case, clamd uses the filename "stream" which you should
1764 be able to verify with { ktrace clamdscan --stream /tmp/eicar.com }. (The
1765 client app will replace "stream" with the original filename before returning
1766 results to stdout, but the trace shows the data).
1768 We will assume that the pathname passed to clamd from Exim does not contain
1769 a colon. We will have whined loudly above if the eml_filename does (and we're
1770 passing a filename to clamd). */
1773 return m_panic_defer(scanent, CUS callout_address,
1774 US"ClamAV returned null");
1776 /* strip newline at the end (won't be present for zINSTREAM)
1777 (also any trailing whitespace, which shouldn't exist, but we depend upon
1778 this below, so double-check) */
1779 p = av_buffer + Ustrlen(av_buffer) - 1;
1780 if (*p == '\n') *p = '\0';
1782 DEBUG(D_acl) debug_printf_indent("Malware response: %s\n", av_buffer);
1784 while (isspace(*--p) && (p > av_buffer))
1788 /* colon in returned output? */
1789 if(!(p = Ustrchr(av_buffer,':')))
1790 return m_panic_defer(scanent, CUS callout_address, string_sprintf(
1791 "ClamAV returned malformed result (missing colon): %s",
1794 /* strip filename */
1795 while (*p && isspace(*++p)) /**/;
1798 /* It would be bad to encounter a virus with "FOUND" in part of the name,
1799 but we should at least be resistant to it. */
1800 p = Ustrrchr(vname, ' ');
1801 result_tag = p ? p+1 : vname;
1803 if (Ustrcmp(result_tag, "FOUND") == 0)
1805 /* p should still be the whitespace before the result_tag */
1806 while (isspace(*p)) --p;
1808 /* Strip off the extended information too, which will be in parens
1809 after the virus name, with no intervening whitespace. */
1812 /* "(hash:size)", so previous '(' will do; if not found, we have
1813 a curious virus name, but not an error. */
1814 p = Ustrrchr(vname, '(');
1818 malware_name = string_copy(vname);
1819 DEBUG(D_acl) debug_printf_indent("Malware found, name \"%s\"\n", malware_name);
1822 else if (Ustrcmp(result_tag, "ERROR") == 0)
1823 return m_panic_defer(scanent, CUS callout_address,
1824 string_sprintf("ClamAV returned: %s", av_buffer));
1826 else if (Ustrcmp(result_tag, "OK") == 0)
1828 /* Everything should be OK */
1829 malware_name = NULL;
1830 DEBUG(D_acl) debug_printf_indent("Malware not found\n");
1834 return m_panic_defer(scanent, CUS callout_address,
1835 string_sprintf("unparseable response from ClamAV: {%s}", av_buffer));
1841 #ifndef DISABLE_MAL_SOCK
1842 case M_SOCK: /* "sock" scanner type ------------------------------------- */
1843 /* This code was derived by Martin Poole from the clamd code contributed
1844 by David Saez and the cmdline code
1848 uschar * commandline;
1849 uschar av_buffer[1024];
1850 uschar * linebuffer;
1851 uschar * sockline_scanner;
1852 uschar sockline_scanner_default[] = "%s\n";
1853 const pcre *sockline_trig_re;
1854 const pcre *sockline_name_re;
1856 /* find scanner command line */
1857 if ( (sockline_scanner = string_nextinlist(&av_scanner_work, &sep,
1859 && *sockline_scanner
1861 { /* check for no expansions apart from one %s */
1862 uschar * s = Ustrchr(sockline_scanner, '%');
1864 if ((*s != 's' && *s != '%') || Ustrchr(s+1, '%'))
1865 return m_panic_defer_3(scanent, NULL,
1866 US"unsafe sock scanner call spec", malware_daemon_ctx.sock);
1869 sockline_scanner = sockline_scanner_default;
1870 DEBUG(D_acl) debug_printf_indent("%15s%10s'%s'\n", "", "cmdline: ",
1871 string_printing(sockline_scanner));
1873 /* find scanner output trigger */
1874 sockline_trig_re = m_pcre_nextinlist(&av_scanner_work, &sep,
1875 "missing trigger specification", &errstr);
1876 if (!sockline_trig_re)
1877 return m_panic_defer_3(scanent, NULL, errstr, malware_daemon_ctx.sock);
1879 /* find virus name regex */
1880 sockline_name_re = m_pcre_nextinlist(&av_scanner_work, &sep,
1881 "missing virus name regex specification", &errstr);
1882 if (!sockline_name_re)
1883 return m_panic_defer_3(scanent, NULL, errstr, malware_daemon_ctx.sock);
1885 /* prepare scanner call - security depends on expansions check above */
1886 commandline = string_sprintf( CS sockline_scanner, CS eml_filename);
1887 DEBUG(D_acl) debug_printf_indent("%15s%10s'%s'\n", "", "expanded: ",
1888 string_printing(commandline));
1890 /* Pass the command string to the socket */
1891 if (m_sock_send(malware_daemon_ctx.sock, commandline, Ustrlen(commandline), &errstr) < 0)
1892 return m_panic_defer(scanent, CUS callout_address, errstr);
1894 /* Read the result */
1895 bread = ip_recv(&malware_daemon_ctx, av_buffer, sizeof(av_buffer), tmo);
1898 return m_panic_defer_3(scanent, CUS callout_address,
1899 string_sprintf("unable to read from socket (%s)", strerror(errno)),
1900 malware_daemon_ctx.sock);
1902 if (bread == sizeof(av_buffer))
1903 return m_panic_defer_3(scanent, CUS callout_address,
1904 US"buffer too small", malware_daemon_ctx.sock);
1905 av_buffer[bread] = '\0';
1906 linebuffer = string_copy(av_buffer);
1907 DEBUG(D_acl) debug_printf_indent("%15s%10s'%s'\n", "", "answer: ",
1908 string_printing(linebuffer));
1910 /* try trigger match */
1911 if (regex_match_and_setup(sockline_trig_re, linebuffer, 0, -1))
1913 if (!(malware_name = m_pcre_exec(sockline_name_re, av_buffer)))
1914 malware_name = US "unknown";
1915 DEBUG(D_acl) debug_printf_indent("%15s%10s'%s'\n", "", "name: ",
1916 string_printing(malware_name));
1918 else /* no virus found */
1919 malware_name = NULL;
1924 #ifndef DISABLE_MAL_MKS
1925 case M_MKSD: /* "mksd" scanner type ------------------------------------- */
1927 char *mksd_options_end;
1928 int mksd_maxproc = 1; /* default, if no option supplied */
1931 if (scanner_options)
1933 mksd_maxproc = (int)strtol(CS scanner_options, &mksd_options_end, 10);
1934 if ( *scanner_options == '\0'
1935 || *mksd_options_end != '\0'
1937 || mksd_maxproc > 32
1939 return m_panic_defer(scanent, CUS callout_address,
1940 string_sprintf("invalid option '%s'", scanner_options));
1943 if((malware_daemon_ctx.sock = ip_unixsocket(US "/var/run/mksd/socket", &errstr)) < 0)
1944 return m_panic_defer(scanent, CUS callout_address, errstr);
1946 malware_name = NULL;
1948 DEBUG(D_acl) debug_printf_indent("Malware scan: issuing %s scan\n", scanner_name);
1950 if ((retval = mksd_scan_packed(scanent, malware_daemon_ctx.sock, eml_filename, tmo)) != OK)
1952 close (malware_daemon_ctx.sock);
1959 #ifndef DISABLE_MAL_AVAST
1960 case M_AVAST: /* "avast" scanner type ----------------------------------- */
1963 uschar * scanrequest;
1964 enum {AVA_HELO, AVA_OPT, AVA_RSP, AVA_DONE} avast_stage;
1966 uschar * error_message = NULL;
1967 BOOL more_data = FALSE;
1970 /* According to Martin Tuma @avast the protocol uses "escaped
1971 whitespace", that is, every embedded whitespace is backslash
1972 escaped, as well as backslash is protected by backslash.
1973 The returned lines contain the name of the scanned file, a tab
1977 [E] - some error occurred
1978 Such marker follows the first non-escaped TAB. For more information
1979 see avast-protocol(5)
1981 We observed two cases:
1983 <- /file [E]0.0 Error 13 Permission denied
1984 <- 451 SCAN Engine error 13 permission denied
1987 <- /file… [E]3.0 Error 41120 The file is a decompression bomb
1989 <- /file… [+]2.0 0 Eicar Test Virus!!!
1992 If the scanner returns 4xx, DEFER is a good decision, combined
1993 with a panic log entry, to get the admin's attention.
1995 If the scanner returns 200, we reject it as malware, if found any,
1996 or, in case of an error, we set the malware message to the error
1999 Some of the >= 42000 errors are message related - usually some
2000 broken archives etc, but some of them are e.g. license related.
2001 Once the license expires the engine starts returning errors for
2002 every scanning attempt. I¹ have the full list of the error codes
2003 but it is not a public API and is subject to change. It is hard
2004 for me to say what you should do in case of an engine error. You
2005 can have a “Treat * unscanned file as infection” policy or “Treat
2006 unscanned file as clean” policy. ¹) Jakub Bednar
2010 if ( ( !ava_re_clean
2011 && !(ava_re_clean = m_pcre_compile(ava_re_clean_str, &errstr)))
2013 && !(ava_re_virus = m_pcre_compile(ava_re_virus_str, &errstr)))
2015 && !(ava_re_error = m_pcre_compile(ava_re_error_str, &errstr)))
2017 return malware_panic_defer(errstr);
2019 /* wait for result */
2020 for (avast_stage = AVA_HELO;
2021 (nread = recv_line(malware_daemon_ctx.sock, buf, sizeof(buf), tmo)) > 0;
2024 int slen = Ustrlen(buf);
2028 /* Multi line responses are bracketed between 210 … and nnn … */
2029 if (Ustrncmp(buf, "210", 3) == 0)
2034 else if (more_data && isdigit(buf[0])) more_data = 0;
2036 switch (avast_stage)
2039 if (more_data) continue;
2040 if (Ustrncmp(buf, "220", 3) != 0)
2041 goto endloop; /* require a 220 */
2045 if (more_data) continue;
2046 if (Ustrncmp(buf, "200", 3) != 0)
2047 goto endloop; /* require a 200 */
2052 /* Check for another option to send. Newline-terminate it. */
2053 if ((scanrequest = string_nextinlist(&av_scanner_work, &sep,
2056 if (Ustrcmp(scanrequest, "pass_unscanned") == 0)
2058 DEBUG(D_acl) debug_printf_indent("pass unscanned files as clean\n");
2062 scanrequest = string_sprintf("%s\n", scanrequest);
2063 avast_stage = AVA_OPT; /* just sent option */
2064 DEBUG(D_acl) debug_printf_indent("send to avast OPTION: %s", scanrequest);
2068 scanrequest = string_sprintf("SCAN %s\n", eml_dir);
2069 avast_stage = AVA_RSP; /* just sent command */
2070 DEBUG(D_acl) debug_printf_indent("send to avast REQUEST: SCAN %s\n", eml_dir);
2073 /* send config-cmd or scan-request to socket */
2074 len = Ustrlen(scanrequest);
2075 if (send(malware_daemon_ctx.sock, scanrequest, len, 0) == -1)
2077 scanrequest[len-1] = '\0';
2078 return m_panic_defer_3(scanent, CUS callout_address, string_sprintf(
2079 "unable to send request '%s' to socket (%s): %s",
2080 scanrequest, scanner_options, strerror(errno)), malware_daemon_ctx.sock);
2087 if (isdigit(buf[0])) /* We're done */
2090 if (malware_name) /* Nothing else matters, just read on */
2093 if (pcre_exec(ava_re_clean, NULL, CS buf, slen, 0, 0, NULL, 0) == 0)
2096 if ((malware_name = m_pcre_exec(ava_re_virus, buf)))
2098 unescape(malware_name);
2100 debug_printf_indent("unescaped malware name: '%s'\n", malware_name);
2104 if (strict) /* treat scanner errors as malware */
2106 if ((malware_name = m_pcre_exec(ava_re_error, buf)))
2108 unescape(malware_name);
2110 debug_printf_indent("unescaped error message: '%s'\n", malware_name);
2114 else if (pcre_exec(ava_re_error, NULL, CS buf, slen, 0, 0, NULL, 0) == 0)
2116 log_write(0, LOG_MAIN, "internal scanner error (ignored): %s", buf);
2120 /* here also for any unexpected response from the scanner */
2121 DEBUG(D_acl) debug_printf("avast response not handled: '%s'\n", buf);
2125 default: log_write(0, LOG_PANIC, "%s:%d:%s: should not happen",
2126 __FILE__, __LINE__, __FUNCTION__);
2133 if (nread == -1) error_message = US"EOF from scanner";
2134 else if (nread < 0) error_message = US"timeout from scanner";
2135 else if (nread == 0) error_message = US"got nothing from scanner";
2136 else if (buf[0] != '2') error_message = buf;
2138 DEBUG(D_acl) debug_printf_indent("sent to avast QUIT\n");
2139 if (send(malware_daemon_ctx.sock, "QUIT\n", 5, 0) == -1)
2140 return m_panic_defer_3(scanent, CUS callout_address,
2141 string_sprintf("unable to send quit request to socket (%s): %s",
2142 scanner_options, strerror(errno)), malware_daemon_ctx.sock);
2145 return m_panic_defer_3(scanent, CUS callout_address, error_message, malware_daemon_ctx.sock);
2149 } /* scanner type switch */
2151 if (malware_daemon_ctx.sock >= 0)
2152 (void) close (malware_daemon_ctx.sock);
2153 malware_ok = TRUE; /* set "been here, done that" marker */
2156 /* match virus name against pattern (caseless ------->----------v) */
2157 if (malware_name && regex_match_and_setup(re, malware_name, 0, -1))
2159 DEBUG(D_acl) debug_printf_indent(
2160 "Matched regex to malware [%s] [%s]\n", malware_re, malware_name);
2168 /*************************************************
2169 * Scan an email for malware *
2170 *************************************************/
2172 /* This is the normal interface for scanning an email, which doesn't need a
2173 filename; it's a wrapper around the malware_file function.
2176 malware_re match condition for "malware="
2177 timeout if nonzero, timeout in seconds
2179 Returns: Exim message processing code (OK, FAIL, DEFER, ...)
2180 where true means malware was found (condition applies)
2183 malware(const uschar * malware_re, int timeout)
2185 int ret = malware_internal(malware_re, NULL, timeout);
2187 if (ret == DEFER) av_failed = TRUE;
2192 /*************************************************
2193 * Scan a file for malware *
2194 *************************************************/
2196 /* This is a test wrapper for scanning an email, which is not used in
2197 normal processing. Scan any file, using the Exim scanning interface.
2198 This function tampers with various global variables so is unsafe to use
2199 in any other context.
2202 eml_filename a file holding the message to be scanned
2204 Returns: Exim message processing code (OK, FAIL, DEFER, ...)
2205 where true means malware was found (condition applies)
2208 malware_in_file(uschar *eml_filename)
2210 uschar message_id_buf[64];
2213 /* spool_mbox() assumes various parameters exist, when creating
2214 the relevant directory and the email within */
2216 (void) string_format(message_id_buf, sizeof(message_id_buf),
2217 "dummy-%d", vaguely_random_number(INT_MAX));
2218 message_id = message_id_buf;
2219 sender_address = US"malware-sender@example.net";
2221 recipients_list = NULL;
2222 receive_add_recipient(US"malware-victim@example.net", -1);
2223 f.enable_dollar_recipients = TRUE;
2225 ret = malware_internal(US"*", eml_filename, 0);
2227 Ustrncpy(spooled_message_id, message_id, sizeof(spooled_message_id));
2230 /* don't set no_mbox_unspool; at present, there's no way for it to become
2231 set, but if that changes, then it should apply to these tests too */
2235 /* silence static analysis tools */
2245 if (!malware_default_re)
2246 malware_default_re = regex_must_compile(malware_regex_default, FALSE, TRUE);
2248 #ifndef DISABLE_MAL_DRWEB
2250 drweb_re = regex_must_compile(drweb_re_str, FALSE, TRUE);
2252 #ifndef DISABLE_MAL_FSECURE
2254 fsec_re = regex_must_compile(fsec_re_str, FALSE, TRUE);
2256 #ifndef DISABLE_MAL_KAV
2258 kav_re_sus = regex_must_compile(kav_re_sus_str, FALSE, TRUE);
2260 kav_re_inf = regex_must_compile(kav_re_inf_str, FALSE, TRUE);
2262 #ifndef DISABLE_MAL_AVAST
2264 ava_re_clean = regex_must_compile(ava_re_clean_str, FALSE, TRUE);
2266 ava_re_virus = regex_must_compile(ava_re_virus_str, FALSE, TRUE);
2268 ava_re_error = regex_must_compile(ava_re_error_str, FALSE, TRUE);
2270 #ifndef DISABLE_MAL_FFROT6D
2271 if (!fprot6d_re_error)
2272 fprot6d_re_error = regex_must_compile(fprot6d_re_error_str, FALSE, TRUE);
2273 if (!fprot6d_re_virus)
2274 fprot6d_re_virus = regex_must_compile(fprot6d_re_virus_str, FALSE, TRUE);
2280 malware_show_supported(FILE * f)
2282 fprintf(f, "Malware:");
2283 for (struct scan * sc = m_scans; sc->scancode != (scanner_t)-1; sc++) fprintf(f, " %s", sc->name);
2288 # endif /*!MACRO_PREDEF*/
2289 #endif /*WITH_CONTENT_SCAN*/